public void ReadNextBlockBeforeReadHeader()
{
var fileName = Path.Combine(testFolder, "file.bin");
File.WriteAllBytes(fileName, new byte[20]);
using (reader = new RsaFileReader(fileName)) {
Assert.Throws(typeof(InvalidOperationException), () => reader.ReadNextBlock());
}
}
public void ReadNextBlock_ZeroBeforeNumber()
{
var fileName = Path.Combine(testFolder, "file.bin");
var bytes = new byte[29];
bytes[1] = 2;
bytes[27] = 45;
bytes[28] = 0;
File.WriteAllBytes(fileName, bytes);
using (reader = new RsaFileReader(fileName)) {
reader.ReadHeader();
var number = reader.ReadNextBlock();
var expectedNumber = BigNumber.FromBytes(new[] { 45 });
Assert.AreEqual(CompareResult.Equal, expectedNumber.Compare(number));
}
}
public void ReadNextBlock_BlockLengthIs5()
{
var fileName = Path.Combine(testFolder, "file.bin");
var bytes = new byte[32];
bytes[1] = 5;
bytes[27] = 23;
bytes[28] = 67;
bytes[29] = 12;
bytes[30] = 149;
bytes[31] = 253;
File.WriteAllBytes(fileName, bytes);
using (reader = new RsaFileReader(fileName)) {
reader.ReadHeader();
var number = reader.ReadNextBlock();
var expectedNumber = BigNumber.FromBytes(new[] { 23, 67, 12, 149, 253 });
Assert.AreEqual(CompareResult.Equal, expectedNumber.Compare(number));
}
}
public void ReadNextBlock_BlockContainsOnlyZeros()
{
var fileName = Path.Combine(testFolder, "file.bin");
var bytes = new byte[] {
0, // version
4, 0, // length of blocks
1, 0, 0, 0, // length of source file
0, 0, 0, 0, // length of source file
0, 0, 0, 0, // hash code
0, 0, 0, 0, // hash code
0, 0, 0, 0, // hash code
0, 0, 0, 0, // hash code
0, 0, 0, 0 // first block
};
File.WriteAllBytes(fileName, bytes);
using (reader = new RsaFileReader(fileName)) {
reader.ReadHeader();
var number = reader.ReadNextBlock();
Assert.IsTrue(number.IsZero);
}
}